diff --git a/Library/Homebrew/extend/pathname.rb b/Library/Homebrew/extend/pathname.rb
index 26ed332ae4..062a68ec3d 100644
--- a/Library/Homebrew/extend/pathname.rb
+++ b/Library/Homebrew/extend/pathname.rb
@@ -261,7 +261,7 @@ class Pathname
     else
       false
     end
-  rescue Errno::EACCES, Errno::ENOENT, Errno::EBUSY
+  rescue Errno::EACCES, Errno::ENOENT, Errno::EBUSY, Errno::EPERM
     false
   end